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    <title>id选择器</title>

    <style>
        #pink {
            color: pink;
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    <h1>样式#定义，结构id调用，只能调用一次，后续无法使用</h1>
    <img src="id选择的使用.png" alt=""><br>
    <div id="pink">html-id选择器</div>
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